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1、论文题目： 义忠煤矿软岩避难硐室支护设计研究专 业 ： 安全技术及工程硕 士 生： 杨坦指导教师： 蔡周全（签名）（签名）_摘 要煤矿井下紧急避险系统是煤矿安全生产系统“六大系统”的组成部分，而井下永久避难硐室又是其中的重要设施，它的建设情况关乎到煤矿安全生产的正常进行。在软岩富集地区进行避难硐室建设存在着较大的困难，主要体现在软岩的膨胀变形对避难硐室的破坏，因此对软岩避难硐室的支护进行研究，控制围岩大变形显得尤为重要。本文在借鉴软岩巷道大变形控制理论的研究成果的基础上，对软岩避难硐室变形失稳演变机制进行了阐述，运用能量支护理论基本分析方法对半圆拱形断面软岩避难硐室开挖支护后的能量再分配进行分
2、析，并采用围岩塑性区理论和结构力学中的辛普生法对避难硐室支护参数进行设计计算，初步确定义忠煤矿避难硐室的支护方式及其参数。同时利用FLAC3D有限差分计算软件对初步制定的开挖方案进行数值模拟，结合硐室围岩现场监测数据的分析结果，对初步设计方案进行了修正，修正后的支护形式及参数为： 一次支护采用锚杆（索）联合支护，锚杆采用 22 2500mm 锚杆，间排拒为800800mm。锚索采用 17.8mm8000mm钢绞线锚索，间距1.5m ；二次支护采用现浇模筑钢筋混凝土，混凝土采用C30级，钢筋选用HRB335级钢，818钢筋，砌碹厚度250mm；三次支护采用改性聚氨酯发泡填充物填充支护，填充材料为
3、弹性模量193.65MPa，抗压强度5.76MPa的聚氨酯-蒙脱石复合材料，并增添十涅二苯乙烯无卤阻燃剂，填充厚度150mm。同时本文还提出了软岩避难硐室施工过程中的大变形控制技术。关 键 词：避难硐室；能量平衡；数值模拟；围岩变形控制；研究类型：应用研究Subject : Study on support design of mine refuge chamber in Yizhongcoal mineSpecialty ： Safety technology and EngineeringName : YANG Tan （Signature）Instructor： CAI Zhouquan
4、 （Signature）_ABSTRACTRefuge chamber is an important installation of emergency system , which is a part of coalmine safety production part of the six systems , and has a great influence on the safetyproduction . Because of the expansion of the soft rock deformation damage to the refugechamber , build
5、ing a refuge chamber in places full of soft rock has greater difficulties . So it isparticularly important to study on support design of mine refuge chamber and controltechnology of large deformation od surrounding rock .This dissertation expound the law of deformation in a refuge chamber, basis on
6、researchresults in the control theory of roadway deformation . It also analysis redistribution of energyof refuge chamber in half-arch tunnel section after being excavated by using the energysupport theory . The article preliminary clear up the support forms support parameters ofrefuge chamber in Yi
7、zhong coal mine , by calculating support paraments using plastic ringtheory and simpson methods in structural mechanics . At the same time using FLAC3D finitedifference calculation software to calculate the preliminary excavation scheme, Combiningwith the site monitoring data of the surrounding rock
8、 in refuge chamber to modify the supportforms support parameter of refuge chamber.that is : First using anchor rod (rope) combinedsupport ,the parameters of anchors are 22 2500mm from 800800mm ; the parameters ofrope are 17.8mm8000mm spacing 1.5m . Second using reinforced concrete support , theparam
9、ents are C30 concrete level in adopts , 818 HRB335 steel reinforcement in grades ,thickness of concrete-lined is 250mm , The third support adopt pu-montmorillonitecomposite material , whose modulus of elasticity is 193.65 MPa ,compressive strength is 5.76MPa , DBDPO is added as flame retardant , the
10、 thickness of filler course is 150mm .Meanwhile the article also puts forward the technology of large deformation control .Key words : Refuge chamber ; Energy balance ; Numerical simulation ; Surroundingrock deformation controlThesis :Application study目录目 录1 绪论.11.1 课题的研究背景和目的. 11.2 国内外研究现状. 11.3 研究思路和内容. 61.4 研究方法和创新点. 72 软岩避难硐室变形失稳演变机制.92.1 软岩的概念. 92.2 软岩的工程力学特征. 102.3 软岩大变形几何场理论. 142.3.1 极分解定理. 142.3.2 S-R 和分解定理 .142.4 软岩避难硐室变形失稳的力学机理及其变形规律 . 152.4.1 软岩避难硐室发生变形失稳的力学原理 . 152.4.2 软岩硐室发生变形失稳的规律. 162.5 本章小结. 173 半圆拱形断面软岩避难硐室能量支护理论分析 . 183.1 软岩避难硐室的能量平衡. 183.2 软岩避难硐室围岩变形能量再分配. 183.2.1 围岩塑性区半径.
